﻿<template>
  <div class="params">
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert
        title="注意:只允许为第三级分类设置相关参数！"
        type="warning"
        show-icon
        :closable="false"
        >
      </el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选中商品分类:</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
            v-model="selectedCateKeys"
            :options="catelist"
            expand-trigger ="hover"
            :props="cateProps"
            @change="handleChange"></el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 动态参数区域 -->
        <el-tab-pane label="动态参数"
        name="many">
          <el-button type="primary" size="mini"
          :disabled="isBtnDisabled"
          @click="addDialogVisible = true">添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table
            :data="manyTableData"
            stripe
            border
            style="width: 100%">
            <el-table-column
              type="expand"
              width="180">
              <template slot-scope="scope">
                <!-- 循环渲染tag标签  -->
                <el-tag
                 v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i, scope.row)">
                  {{item}}
                </el-tag>
                <!-- 输入框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加tag按钮 -->
                <el-button v-else class="button-new-tag"
                size="small"
                @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column
              type="index"
              label="#"
              width="180">
            </el-table-column>
            <el-table-column
              prop="attr_name"
              label="参数名称"
              width="180">
            </el-table-column>
            <el-table-column
              label="操作">
              <template slot-scope="scope">
                <el-button type="primary"
                size="mini"
                icon="el-icon-edit"
                @click="showEditDialog(scope.row.attr_id)"
                >
                修改
                </el-button>
                <el-button type="danger"
                icon="el-icon-delete"
                size="mini"
                @click="removeParams(scope.row.attr_id)"
                >
                删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 静态属性区域 -->
        <el-tab-pane label="静态属性"
        name="only">
          <el-button type="primary" size="mini"
          :disabled="isBtnDisabled"
          @click="addDialogVisible = true"
          >添加属性</el-button>
          <!-- 静态属性表格 -->
          <el-table
            :data="onlyTableData"
            stripe
            border
            style="width: 100%">
            <el-table-column
              type="expand"
              width="180">
              <template slot-scope="scope">
                <!-- 循环渲染tag标签  -->
                <el-tag
                 v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i, scope.row)">
                  {{item}}
                </el-tag>
                <!-- 输入框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加tag按钮 -->
                <el-button v-else class="button-new-tag"
                size="small"
                @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column
              type="index"
              label="#"
              width="180">
            </el-table-column>
            <el-table-column
              prop="attr_name"
              label="属性名称"
              width="180">
            </el-table-column>
            <el-table-column
              label="操作">
              <template slot-scope="scope">
                <el-button type="primary"
                size="mini"
                icon="el-icon-edit"
                @click="showEditDialog(scope.row.attr_id)"
                >
                修改
                </el-button>
                <el-button type="danger"
                icon="el-icon-delete"
                size="mini"
                @click="removeParams(scope.row.attr_id)"
                >
                删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加动态参数弹框，添加静态属性弹框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      @close="addDialogClosed"
      width="50%">
      <!-- 添加参数表单 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数弹框 -->
     <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      @close="editDialogClosed"
      width="50%">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 商品分类列表
      catelist: [],
      // 级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        chilren: 'children'
      },
      // 级联选择框双向绑定的数组
      selectedCateKeys: [],
      // tabs默认展示页面
      activeName: 'many',
      // 动态参数
      manyTableData: [],
      // 静态参数
      onlyTableData: [],
      // 添加弹框的显示与隐藏
      addDialogVisible: false,
      // 添加参数弹框表单
      addForm: {
        name: ''
      },
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数', trigger: 'blur' }
        ]
      },
      // 修改框的显示与隐藏
      editDialogVisible: false,
      // 修改的表单数据，后台传过来重命名
      editForm: {},
      // 修改表单规则
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数', trigger: 'blur' }
        ]
      }
      // tag输入框显示与隐藏
      // inputVisible: false,
      // tag输入框输入内容
      // inputValue: ''
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.catelist = res.data
      // console.log(res)
      this.$message.success('获取商品分类成功！')
    },
    // 级联选择框选中项变化，会触发这个函数
    handleChange () {
      // console.log(this.selectedCateKeys)
      this.getParamsData()
    },
    handleTabClick () {
      console.log(this.activeName)
      this.getParamsData()
    },
    // 将级联选择器中的内容提取
    // 获取参数
    async getParamsData () {
      // 证明选中的不是三级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return false
      }
      // 证明选中的是三级分类
      // console.log(this.selectedCateKeys)
      // 根据所选分类的id,和当前所选的面板，获取对应的数据
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
        params: { sel: this.activeName }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败！')
      }
      res.data.forEach(item => {
        // 如果attr_为不为空则执行命令，为空则
        item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
        // 添加boolean来控制文本框的显示和隐藏
        item.inputVisible = false
        // 文本框输入的值
        item.inputValue = ''
      })
      // console.log(res.data)
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
      this.$message.success('获取参数列表成功！')
    },
    // 监听添加属性弹框关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮添加属性提交表单事件
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return false
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败!')
        }
        this.$message.success('添加参数成功!')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    // 点击修改按钮展示弹框
    async showEditDialog (attrId) {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${attrId}`, {
        params: {
          attr_sel: this.activeName
        }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败!')
      }
      this.$message.success('获取参数信息成功!')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 关闭修改框按钮重置表单
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 点击确定按钮提交修改参数表单
    editParams () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return false
        // put('地址', { 提交的数据 })
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, {
          attr_name: this.editForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败!')
        }
        this.$message.success('修改参数成功!')
        this.getParamsData()
        this.editDialogVisible = false
      })
    },
    // 点击删除删除这条参数
    async removeParams (attrId) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除！')
      }
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attrId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败!')
      }
      this.$message.error('删除参数成功!')
      this.getParamsData()
    },
    // tag文本框失去焦点，或者按下enter都会触发
    handleInputConfirm (row) {
      // 去重字符串的空格
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return false
      }
      // 如果没有return则证明输入的内容，需要做
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
      // this.getParamsData()
    },
    // 抽离公共的请求,将attr_vals的操作，保存在数据库
    async saveAttrVals (row) {
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        // 后端接受字符串，所以将数组使用，进行拼接
        attr_vals: row.attr_vals.join(',')
      })
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败！')
      }
      this.$message.success('修改参数项成功!')
    },
    // 点击添加按钮 展示tag文本框的显示和隐藏
    showInput (row) {
      row.inputVisible = true
      // 让文本框自动获取焦点
      // $nextTick 方法作用，当页面上元素被重新渲染之后，才会指定回调函数中的代码
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 根据索引i删除tag标签
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  },
  computed: {
    // 如果按钮需要被禁用则返回true
    isBtnDisabled () {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    // 当前选中的三级分类的id
    cateId () {
      if (this.selectedCateKeys.length === 3) {
        // 选中最后一项
        return this.selectedCateKeys[2]
      }
      // 没有id值
      return null
    },
    // 动态计算弹框标题
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    }
  }
}
</script>

<style lang="less" scoped>
.params{
  .cat_opt{
    margin:15px 0;
  }
  .el-tag{
    margin:10px;
  }
  .input-new-tag{
    width:150px;
  }
}
</style>
